Trigonometry help.

These are not really H.W questions but i have an exam coming very soon and i have some problems:
Trigonometry:
i) Express as a single trigonometric function sinxcosxsec˛x (i keep on going in circles in this one)

ii) A square B, has a diagonal 2x. A square C has twice the area of square A. Find in terms of x, the perimeter of the squre C.